I'm having problems on the Lightroom CC App,as it seem's that when I open the Develop heading at the top of the screen,there is message that comes,which says this section is disabled and I need to renew my membership.My membership is up to date regarding payments etc.I use the student/ teacher version of the CC as I'm a student.Can anybody please advise what the problems seem's to be and what can i do to access the develop and other facilities on Lightroom?

This is an indication that Lightroom is not connected to your subscription. Verify that your are logged into the Creative Cloud desktop app, or try logging out and back in again to refresh your subscription information: Sign out, Sign in | Creative Cloud Desktop app.

Also, verify that your student subscription is still current and active.